TRNW-2: 16 model 62te lock up theory

[Justin Merritt]

Hello all,
i have a new job here on a 2016 grand garavan 62te.  i do these
transmission fairly regular and have great success.  This is a new job that
i have not worked on yet, but i am trying to wrap my mind around the theory
of what i am feeling (customer complaint) on my diagnoses.  I have a cost
down hard bump that seems to be doing something with the converter at
around 38 mph.  I do feel an unusual lock up engagement also, but not near
as bad as the unlock i am suspecting.  I am confident that the transmission
is at the early stages of a converter failure, but i am trying to school
myself on what is going on before i pull to rebuild.  I am including a
screen shot of shop stream data that shows the converter slip going deeply
negative when i feel this bump.  Anyone can explain the mechanical theory
behind what i am seeing?  the vehicle has not set any codes yet.

Thanks Justin
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